CROSS-REFERENCE TO RELATED APPLICATIONS
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This application claims the priority of Korean Patent Application No.
10-2012-0070529 filed on June 29, 2012 , in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
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The present invention relates to a transformer, and more particularly, to a transformer in which an insulation distance may be easily adjusted.
Description of the Related Art
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Generally, a driving voltage required for an electronic apparatus is relatively low; however, a voltage of external power supplied to the electronic apparatus may be high. Therefore, the electronic apparatus includes a transformer for reducing a relatively high external voltage to a voltage appropriate for use in the electronic apparatus.
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The transformer may include pin members formed at both ends of a bobbin, wherein the pin members have coils wound therearound. Here, the pin member formed at one end of the bobbin and the pin member formed at the other end of the bobbin should have a predetermined distance maintained therebetween in order to secure an insulation distance between a primary coil and a secondary coil.
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However, since the insulation distance may be changed according to a type of electronic apparatus in which the transformer is mounted, bobbins having different insulation distances must be manufactured, according to a type of electronic apparatus.
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However, this scheme has a problem in that transformer manufacturing productivity may be decreased while manufacturing costs of the transformer may be increased.
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Meanwhile, as related art associated with the present invention, there are provided Patent Documents 1 and 2. Patent Document 1 discloses a transformer having two insulation distances, while Patent Document 2 discloses a transformer having a plurality of terminal strands 2-2, 2-3, 4-1, and 4-2.
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However, in Patent Document 1, various changes to the insulation distance are impossible, and in Patent Document 2, since the transformer simply includes a plurality of leads 2-4, various insulation distances according to a type of electronic apparatus may not be provided.
[Related Art Document]
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- (Patent Document 1) KR2005-021683 A
- (Patent Document 2) JP1994-120047 A
SUMMARY OF THE INVENTION
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An aspect of the present invention provides a transformer in which various insulation distances may be provided according to a type of electronic apparatus.
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According to an aspect of the present invention, there is provided a transformer including: a bobbin having at least one first coupling unit formed at one end thereof; a first assembling member having a second coupling unit formed to be selectively coupled to the first coupling unit; a first pin member formed on the assembling member; and a second pin member formed at the other end of the bobbin.
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The bobbin may have a cut part formed in one end thereof, wherein the cut part has the assembling member fitted thereinto.
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The first coupling unit may be first protrusions and first grooves repeatedly formed in a lengthwise manner in the cut part, and the second coupling unit may be second grooves and second protrusions to be fitted into the first protrusions and the first grooves, respectively.
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The second grooves and the second protrusions may be elongatedly formed along a circumference of the assembling member.
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The first coupling unit may be first protrusions and first grooves repeatedly formed in a lengthwise manner in the bobbin, and the second coupling unit may be second grooves and second protrusions to be fitted into the first protrusions and the first grooves, respectively.
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The first assembling member may be provided with a fitting groove into which one end of the bobbin is fitted.
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The first coupling unit may be first protrusions and first grooves repeatedly formed on one surface or both surfaces of the bobbin in a lengthwise manner in the bobbin, and the second coupling unit may be second grooves and second protrusions formed on an inner surface of the fitting groove and fitted into the first protrusions and the first grooves, respectively.
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The first coupling unit may be a receiving groove formed in one end of the bobbin and receiving a portion of the assembling member therein, and the second coupling unit may be a protrusion piece inserted into the receiving groove.
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The receiving groove and the protrusion piece, respectively, may be provided to have a concave part and a convex part.
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The first pin member or the second pin member may be provided in plural, and the plurality of first pin members or the plurality of second pin members may have different lengths.
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The transformer may further include a third pin member formed at the other end of the bobbin.
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The bobbin may further include a first coupling unit formed at the other end thereof and a second coupling unit coupled to the first coupling unit formed at the other end of the bobbin, and the second pin member may be formed on the second assembling unit.
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The bobbin may have cut parts formed at one end thereof and the other end thereof, respectively, and the cut parts may have the first and second assembling members fitted thereinto, respectively.
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The first assembling member may be provided with a first fitting groove into which one end of the bobbin is fitted, and the second assembling member may be provided with a second fitting groove into which the other end of the bobbin is fitted.
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The first coupling unit may be receiving grooves formed in one end and the other end of the bobbin, respectively receiving a portion of the first assembling member and a portion of the second assembling member therein, and the second coupling unit may be a protrusion piece inserted into the receiving groove.
BRIEF DESCRIPTION OF THE DRAWINGS
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The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
- FIG. 1 is an exploded perspective view of main parts of a transformer according to a first embodiment of the present invention;
- FIGS. 2 and 3 are views illustrating a coupled state between a bobbin and an assembling member shown in FIG. 1;
- FIG. 4 is an exploded perspective view of main parts of a transformer according to a second embodiment of the present invention;
- FIGS. 5 and 6 are side views illustrating various coupled states between a bobbin and an assembling member shown in FIG. 4;
- FIG. 7 is an exploded perspective view of main parts of a transformer according to a third embodiment of the present invention;
- FIG. 8 is a cross-sectional view illustrating a coupled state between a bobbin and an assembling member shown in FIG. 7;
- FIG. 9 is an exploded perspective view of main parts of a transformer according to a fourth embodiment of the present invention;
- FIG. 10 is a cross-sectional view illustrating a coupled state between a bobbin and an assembling member shown in FIG. 9;
- FIG. 11 is an exploded perspective view of main parts of a transformer according to a fifth embodiment of the present invention;
- FIG. 12 is an assembled perspective view of main parts of a transformer according to a sixth embodiment of the present invention;
- FIG. 13 is an exploded perspective view of main parts of a transformer according to a seventh embodiment of the present invention; and
- FIGS. 14 and 15 are views illustrating various coupled states between a bobbin and an assembling member shown in FIG. 13.
DETAILED DESCRIPTION OF THE EMBODIMENTS
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Insulation distances of transformers used in electronic apparatuses, that is, distances between a first pin member to which a distal end of a primary coil is fixed and a second pin member to which a distal end of a secondary coil is fixed, may be different according to a type of electronic apparatus.
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Deviations in the insulation distances according to the type of electronic apparatus may be generally several mm to several tens mm. However, when the insulation distance is not secured, stability of the transformer may be deteriorated. On the contrary, when an insulation distance larger than a required insulation distance is secured, a size of the transformer becomes unnecessarily large.
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The present invention, the purpose of which is to improve these defects, is characterized in that a bobbin is configured of two or more members so that an insulation distance may be easily adjusted according to a type of electronic apparatus.
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In the present invention as described above, a coupling position between members is adjusted, whereby a distance (that is, an insulation distance) between first and second pin members may be easily changed.
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Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
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Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.
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FIG. 1 is an exploded perspective view of main parts of a transformer according to a first embodiment of the present invention; FIGS. 2 and 3 are views illustrating a coupled state between a bobbin and an assembling member shown in FIG. 1; FIG. 4 is an exploded perspective view of main parts of a transformer according to a second embodiment of the present invention; FIGS. 5 and 6 are side views illustrating various coupled states between a bobbin and an assembling member shown in FIG. 4; FIG. 7 is an exploded perspective view of main parts of a transformer according to a third embodiment of the present invention; FIG. 8 is a cross-sectional view illustrating a coupled state between a bobbin and an assembling member shown in FIG. 7; FIG. 9 is an exploded perspective view of main parts of a transformer according to a fourth embodiment of the present invention; FIG. 10 is a cross-sectional view illustrating a coupled state between a bobbin and an assembling member shown in FIG. 9; FIG. 11 is an exploded perspective view of main parts of a transformer according to a fifth embodiment of the present invention; FIG. 12 is an assembled perspective view of main parts of a transformer according to a sixth embodiment of the present invention; FIG. 13 is an exploded perspective view of main parts of a transformer according to a seventh embodiment of the present invention; and FIGS. 14 and 15 are views illustrating various coupled states between a bobbin and an assembling member shown in FIG. 13.
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The transformer according to the first embodiment of the present invention will be described with reference to FIGS. 1 through 3.
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The transformer 100 according to the first embodiment of the present invention may include a bobbin 10, an assembling member 20, a first pin member 40, and a second pin member 50. In addition, the transformer 100 may further include a core (not shown) mounted in the bobbin 10 and a coil (not shown) wound around the bobbin 10. Here, the coil may be classified into a primary coil portion and a secondary coil portion. Voltages having different magnitudes may be applied to the primary and secondary coil portions, respectively.
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The bobbin 10 may have a bar shape in which it is extended lengthwise in a first direction (an X axis direction based on FIG. 1). The bobbin 10 may include a through-hole 11 formed at the center thereof and extended lengthwise in a length direction thereof. The core forming a magnetic path may be inserted into the through-hole 11.
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The bobbin 10 may have pin members 40, 42, and 50 coupled to both ends thereof. More specifically, the bobbin 10 may have the first pin members 40 and 42 coupled to one end 12 thereof and the second pin member 50 coupled to the other end 14 thereof.
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Meanwhile, the bobbin 10 may have a cut part 16 formed at one end 12 thereof. The cut part 16 may be extended lengthwise in the length direction (the X axis direction based on FIG. 1) of the bobbin 10.
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The cut part 16 may be provided with a plurality of first protrusions 70 and a plurality of first grooves 72. The first protrusions 70 and the first grooves 72 may be formed at a side of the cut part 16 and may be repeatedly formed in a length direction (an X axis direction based on FIG. 1) of the cut part 16.
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The assembling member 20 may be fitted into one end 12 of the bobbin 10. More specifically, the assembling member 20 may have a shape that is the same as or similar to that of the cut part 16 of the bobbin 10 and may be selectively fitted into or separated from the cut part 16 of the bobbin 10. To this end, the assembling member 20 may be provided with second grooves 82 and second protrusions 80 corresponding to the first protrusion 70 and the first grooves 72 of the cut part 16, respectively.
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For reference, the first protrusion 70 and the first groove 72 described in the present embodiment may be a first coupling unit described in the claims and the second protrusion 80 and the second groove 82 described in the present embodiment may be a second coupling unit described in the claims.
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The first pin members 40 and 42 may be formed at one end 12 of the bobbin 10 and the assembling member 20, respectively, and the second pin member 50 may be formed at the other end 14 of the bobbin 10. A distal end portion of the primary coil may be fixed to the first pin members 40 and 42 and a distal end portion of the secondary coil may be fixed to the second pin member 50. Therefore, the primary and secondary coil portions may have an insulation distance maintained therebetween by a distance between the first pin members 40 and 42 and the second pin member 50.
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Meanwhile, the first pin member 42 formed at one end 12 of the bobbin 10 may be omitted as needed. In addition, although the case in which the number of first pins 40 and 42 is four and the number of second pins 50 is five is shown in FIG. 1, this is only an example and may be changed as needed.
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In the transformer 100 configured as described above, various insulation distances L1 and L2 may be provided, as shown in FIGS. 2 and 3. Further, in the transformer 100, the insulation distance L2 may be adjusted.
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For example, the transformer 100 may have a first insulation distance L1 (a distance between the first pin member 42 and the second pin member 50) and a second insulation distance L2 (a distance between the first pin member 40 and the second pin member 50), as shown in FIG. 2. In addition, the second insulation distance L2 may be adjusted by changing a coupling position of the assembling member 20 as shown in FIG. 2 or FIG. 3. That is, in the transformer 100 according to the present embodiment, the insulation distance L2 may be decreased by fitting the assembling member 20 into an inner side of the cut part 16 (in a positive direction of the X axis based on FIG. 1) and the insulation distance L2 may be increased by fitting the assembling member 20 into an outer side of the cut part 16 (in a negative direction of the X axis based on FIG. 1).
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Therefore, in the transformer 100 according to the present embodiment, the insulation distances L1 and L2 may be easily selected and changed according to a type of electronic apparatus in which the transformer is to be mounted.
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Next, other embodiments of the present invention will be described.
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For reference, in a description of the following embodiments, the same reference numerals will be used to describe components the same as those of the first embodiment. In addition, a detailed description of these components will be omitted.
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The transformer according to the second embodiment of the present invention will be described with reference to FIGS. 4 through 6.
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The transformer 100 according to the second embodiment of the present invention may be different in terms of a shape of an assembling member 20 from the transformer 100 according to the first embodiment of the present invention. That is, the assembling member 20 according to the second embodiment of the present invention may be different from the assembling member 20 according to the first embodiment of the present invention in that second protrusions 80 and second grooves 82 may be formed along a circumference (in a Y-Z plane direction) thereof.
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In the transformer 100 configured as described above, a coupling position of the assembling member 20 may be changed in both of a length direction (an X axis direction based on FIG. 4) of the bobbin 10 and a height direction (a Z axis direction of FIG. 4) of the bobbin 10.
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For example, as shown in FIG. 5, the assembling member 20 may be disposed so that a height deviation between first pin members 40 and 42 may be relatively maximized, as shown in FIG. 5 or be disposed so that the height deviation between the first pin members 40 and 42 may be relatively minimized, as shown in FIG. 6. Here, in the former case, since the maximum distance between the first pin members 40 and 42 adjacent to each other may be secured, the generation of noise between the pins adjacent to each other may be significantly reduced. On the contrary, in the latter case, since the bobbin 10 and the assembling member 20 may be stably coupled to each other, durability of the transformer 100 may be improved.
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The transformer according to the third embodiment of the present invention will be described with reference to FIGS. 7 and 8.
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The transformer 100 according to the third embodiment of the present invention may be different in terms of differences in positions of first and second coupling units from the transformers 100 according to the embodiments of the present invention described above.
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That is, first protrusions 70 and first grooves 72 which are the first coupling unit may be formed on and in a lower surface of one end 12 of the bobbin 10, and second protrusions 80 and second grooves 82 which are the second coupling unit may be formed on and in an upper surface of the assembling member 20.
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In the transformer 100 configured as described above, since the bobbin 10 and the assembling member 20 are easily coupled to and decoupled from each other, the coupling position of the assembling member 20 may easily be changed.
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The transformer according to the fourth embodiment of the present invention will be described with reference to FIGS. 9 and 10.
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The transformer 100 according to the fourth embodiment of the present invention may be different from the transformer 100 in terms of shapes of a bobbin 10 and an assembling member 20, according to the embodiments of the present invention described above.
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The bobbin 10 according to the fourth embodiment of the present invention may have a plurality of first grooves 72 formed in one end 12 thereof. Here, the first grooves 72 may be repeatedly formed in one end 12 of the bobbin 10 in a length direction (an X axis direction based on FIG. 9) of the bobbin 10. In addition, the first grooves 72 may have a semi-circular cross section so that they may be easily coupled to second protrusions 80 to be described below.
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The assembling member 20 according to the fourth embodiment of the present invention may have a fitting groove 22 that may receive one end 12 of the bobbin 10 therein. The fitting groove 22 may be provided with a plurality of second protrusions 80. The second protrusions 80 may have a cross section having a shape (that is, a semi-circular shape) corresponding to the first groove 72.
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Since the transformer 100 configured as described above has a structure in which one end 12 of the bobbin 12 is fitted into the fitting groove 22 of the assembling member 20, coupling force between the bobbin 10 and the assembling member 20 may be improved.
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In addition, since the first groove 72 and the second protrusion 80 have the semi-circular cross section (See FIG. 10), a position at which the assembling member 20 is coupled to the bobbin 10 may be significantly easily changed.
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The transformer according to the fifth embodiment of the present invention will be described with reference to FIG. 11.
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The transformer 100 according to the fifth embodiment of the present invention may be different in a coupled structure between a bobbin 10 and an assembling member 20 from the transformer 100 according to the embodiments of the present invention described above. More specifically, in the transformer 100 according to the present embodiment, first and second coupling units may have shapes other than a protrusion and a groove.
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For example, the first coupling unit may be a receiving groove 18 formed in one end 12 of the bobbin 10 and the second coupling unit may be a protrusion piece 24 elongatedly formed at one end of the assembling member 20.
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Therefore, the bobbin 10 and the assembling member 20 may be coupled to each other by the protrusion piece 24 fitted into the receiving groove 18. In addition, an insulation distance between the first pin member 40 and the second pin member 50 may be adjusted according to an insertion depth of the protrusion piece 24 fitted into the receiving groove 18.
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In the transformer 100 configured as described above, since the bobbin 10 and the assembling member 20 are coupled to each other by surface-contact between the receiving groove 18 and the protrusion piece 24, the insulation distance between the first pin member 40 and the second pin member 50 may be more precisely adjusted.
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Meanwhile, when the position at which the assembling member 20 is coupled to the bobbin 10 is determined, an adhesive is applied to the position at which the bobbin 10 and the assembling member 20 are coupled to each other, whereby the coupling force between the bobbin 10 and the assembling member 20 may be increased.
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The transformer according to the sixth embodiment of the present invention will be described with reference to FIG. 12.
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The transformer 100 according to the sixth embodiment of the present invention may be different in terms of a shape of a bobbin 10 from the transformer 100 according to the embodiments of the present invention described above. More specifically, the bobbin 10 according to the sixth embodiment of the present invention may include a cut part 142 formed at the other end 14 thereof, wherein the cut part 142 may have a third pin member 60 coupled thereto.
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In the transformer 100 configured as described above, various insulation distances L1, L2, L3, and L4 may be provided. For example, in the transformer 100 according to the present embodiment, a first insulation distance L1 formed by the first pin member 42 and the second pin member 50, a second insulation distance L2 formed by the first pin member 40 and the second pin member 50, a third insulation distance L3 formed by the first pin member 42 and the third pin member 60, and a fourth insulation distance L4 formed by the first pin member 40 and the third pin member 60 may be provided.
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Therefore, the transformer 100 according to the present embodiment may be widely used regardless of a type and a size of electronic apparatus.
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The transformer according to the seventh embodiment of the present invention will be described with reference to FIGS. 13 through 15.
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The transformer 100 according to the seventh embodiment of the present invention may be different from the transformer 100 according to the embodiments of the present invention described above in that it includes two assembling members 20 and 30.
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The bobbin 10 according to the present embodiment 10 may have two cut parts 16 and 17. For example, the bobbin 10 may have cut parts 16 and 17 formed at one end 12 thereof and the other end 14 thereof, respectively. A first assembling member 20 may be fitted into the cut part 16 formed at one end 12 of the bobbin 10, and a second assembling member 30 may be fitted into the cut part 17 formed at the other end 14 thereof. In addition, the first assembling member 20 may be provided with a first pin member 40, and the second assembling member 30 may be provided with a second pin member 50.
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In the transformer 100 configured as described above, coupling positions of the first and second assembling members 20 and 30 are changed, whereby an insulation distance L2 between the first and second pin members 40 and 50 may be variously adjusted.
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Meanwhile, although the above-mentioned embodiments and the accompanying drawings have described and shown that some pin members 40 are provided at the assembling member 20, all pin members 40 and 42 may be provided at the assembling member 20 as needed.
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In addition, although the above-mentioned embodiment has described that the primary coil is fixed to the first pin member 40 and the secondary coil is fixed to the second pin member 50, the secondary coil may be fixed to the first pin member 40 and the primary coil may be fixed to the second pin member 50 for convenience of a worker.
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As set forth above, according to the embodiments of the present invention, the insulation distance between the pin members may be easily changed according to a type of electronic apparatus.
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While the present invention has been shown and described in connection with the embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.
